Sash-balance



R. J. WILLIAMS.

SASH BALANCE.

APPLICATION FILED APR. 1, 1919.

[NVENTOR 15. JC Wz/lu'ams ATTORN EYS RICHARD J. WILLIAMS, OF SAN rnancrsco, carrronnia,

essrenoe or ONE-HALF '10 PETER GRASSI, 015 SAN FRANCISCO, CALIFQRNIA.

SASH-BALANCE.

Application filed April 1, 1919.

This invention relates to a window con struction and particularly pertains to a sash balance.

It is the principal object of this invention to provide a sash weight which may be made of dimensions larger than the opening into the sash pocket of the window frame and will be so designed as to readily pass through these openings without inconvenience.

Another object of this invention is to provide a sash weight, preferably made of plastic material, which, while simple in construction, will at the same time be quite strong and not liable to break loose from its suspension means.

The invention is illustrated by way of example in the accompanying drawings, in which Figure 1 is a fragmentary view of a window frame, showing the complementary vertically slidable sash thereof and one of the sash balances therefor.

Fig. 2 is a view in vertical section, illustrating the preferred form of the sash weight, showing the manner in which a cord pulley is detachably secured therein.

Fig. 3 is a view in side elevation, illustrating a modified form of the sash weight.

Fig. 4 a view in horizontal section, as seen on the line H of Fig. 1, showing the sectional formation of the sash weight and the manner in which it is inserted into the weight pocket.

Referring to the drawings, 10 indicates a window frame adapted to inclose a lower sash 11 and an upper sash 12. These sashes are vertically slidable and are secured at their opposite sides to sash cords 13. As indicated in dotted lines of Fig. 1, one cord is used at each side of the window frame and its opposite ends are attached to the sashes 11 and 12 at the points 14 and 15, respectively. The main portion of the cord 13 passes over a pair of pulleys 16 which are freely mounted upon a common axle 17. The sash cord is thus looped and hangs down within a weight well 18 where it Specification of Letters Patent.

Patented Aug. 24:, 1920.

Serial No. 288,634.

passes around a pulley 19. As shown in Fig. 2, the pulley 19 is provided to be detachably secured to a pin 20. This pulley is constructed with a hoolemember 21 secured to the axle 22 of the pulley and cooperating with a guard plate 23 upon the opposite end of the axle to provide an opening into which the pin may be positioned and from which it is not liable to be accidentally displaced.

The pin 20 is embedde within a concrete sash weight 261 and preferably extends across apulley pocket 25, represented by a depression in the upper end of the weight. Due to the arrangement of this pocket, the sash cord 13 will remain in proper position upon the pulley groove and will be held without other guide members. The sash weight 2 1, as formed of concrete, is suitably reinforced by a sheet of reticulated material 26. This material extends downwardly within the body of the weight and is suitably secured to the upper ends of the pin 20.

It is common in window construction to provide the well 18 with a weight opening 27 through which the ordinary cast iron weights are passed. Due to the fact that in the present instance a weight of substantially twice the sectional area of cast-iron weights is used to counter-balance both win dow sashes, it is necessary to enlarge the passageway 2'? or to alter the form of the weight.

One object of the present invention is to provide a weight of large bull; which may be conveniently passed through the opening 27, as shown in Fig. 4. This is done by making the weight of crescent-shape when considered in. transverse section and thereby causing it to be readily inserted and turned through the opening 27. from the dotted line position shown in Fig. 1, to assume the operative position indicated by the solid lines in the same figure.

Reference being had to Fig. 3, it will be seen that the reinforcing member 26 is eliminated and a suitable wire reinforcement 28 provided. This wire is looped at its upper end and is adapted to receive the hook 21 of the pulley 19. In the present case a guard member 29 extends around the pulley and prevents the cord from moving therefrom.

In operation of the present invention, the window sashes are fitted with cords 13 and the pulleys 19 and at thistime the sash cords 13 may be positioned around the pulleys 19. It, of course may be found desirable to place this cord in position before its ends are attached to the windows.

In operation, the elevation of the lower sash or the lowering of the upper sash will be counter-balanced by the movement of the sash weights and when the form of weights shown in Fig. 2, is used, the pulley 19 will be held within the depression of the weight in a manner to prevent accidental removal of the cord 13.

It will thus be seen that the structure here disclosed, while decidedly simple, eliminates a number of parts commonly used in win dow construction and at the same time provides a. simple counter-balance for both slidable sashes of the window and also provides an inexpensive and desirable window weight.

lVhile I have shown the preferred form of my invention, it will be understood that various changes in the combination, construction and arrangement of parts may be made by those skilled in the art, without departing from the spirit of the invention as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent isi i 1. A window frame having a vertical weight channel at the side and a removal opening at one side, a weight having trans verse dimensions to substantially fill the channel, said weight being crescent shaped in transverse section, with the greatest thickness less than the width of the removal opening of the casing, said weight being turnable with its concavity about the inner edge of the opening to remove it.

. 2. A sash weight adapted to be moved in a guiding wall or channel and having a transverse width approximately equal to the channel width, one wall being formed with 'a vertical removal opening, the vertical faces of the weight being concavo-convex, and the radial thickness being less than the vertical removal opening of the channel, said weight being turnable with its'concavity in contact with the removal opening when passing through it.

' In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

RICHARD J. WVILLIAMS.

Witnesses: 7

V. W. HEALEY, P. GRAIF. 

